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Vishay General Semiconductor - Diodes Division SMB8J8.0CA-E3/52
- Part No.:
- SMB8J8.0CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J8.0CA-E3/52.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,934
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Product details
Overview
SMB8J8.0CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features 8.0 V stand-off voltage (VWM), 13.6 V maximum clamping voltage (VC) at 100 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J8.0CA-E3/52 datasheet, SMB8J8.0CA-E3/52 pinout, SMB8J8.0CA-E3/52 application, or SMB8J8.0CA-E3/52 equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable power dissipation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (min/max) | 8.89 V / 9.83 V at 1.0 mA test current - defines precise breakdown threshold window |
| VC @ IPPM | 13.6 V at 100 A - clamping voltage during full-rated 10/1000 μs surge, limiting downstream stress |
| PPPM | 800 W - peak pulse power handling capability with standard 10/1000 μs waveform |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves signal integrity in high-impedance circuits |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current bidirectionally when voltage exceeds ±VBR |
| Case | Non-electrical mechanical interface | Plastic molded body provides UL 94 V-0 flammability rating and thermal path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Supports standard SMT reflow without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures long-term stability of breakdown parameters and resistance to humidity-induced degradation |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: Limits transient voltage to ≤13.6 V during 100 A surges, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance for current limiting. Use Value: Withstands repeated 800 W surges while maintaining <1.0 μA leakage, ensuring stable logic thresholds and low false-trigger rates. |
| USB Interface ESD Protection | DC Power Rail Clamping |
Use Scenario: Secondary-level ESD and surge protection on USB 2.0 data lines (D+/D−) in automotive infotainment head units. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp placed after common-mode choke to suppress differential-mode transients. Use Value: Sub-100 ps response time and 13.6 V clamping prevent latch-up in USB transceivers during ±8 kV contact discharge events. | Use Scenario: Input rail protection for DC-DC converters powering ADAS cameras or radar modules from 12 V vehicle battery. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing load-dump spikes up to 35 V/100 ms without failure. Use Value: 800 W PPPM rating and +150 °C TJ max enable robust operation during extended high-temperature battery transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA-E3/52 | Same VWM (8.0 V), VBR (8.89–9.83 V), VC (13.6 V), but 1000 W PPPM (unidirectional only); not bidirectional | Requires polarity-aware layout; unsuitable for AC or floating signals without additional design effort | Select only if unidirectional clamping suffices and higher 1000 W rating is required |
| SMCJ8.0CA-E3/52 | Same electrical specs but larger SMC (DO-214AB) package; RθJA = 30 °C/W vs. 72 °C/W | Higher thermal mass supports longer surge durations but requires 30% more PCB area | Prefer for high-repetition-rate surges where thermal dissipation dominates over space constraints |
Compared with SMBJ8.0CA-E3/52 and SMCJ8.0CA-E3/52, SMB8J8.0CA-E3/52 uniquely delivers bidirectional 800 W clamping in the smallest footprint (SMB), making it optimal for space-constrained automotive and industrial signal-line protection where polarity-agnostic operation is mandatory.
Availability
SMB8J8.0CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB data line protection, and DC power rail clamping requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J8.0CA-E3/52 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and automotive-grade qualification.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J8.0CA-E3/52 at its rated peak pulse current?
The SMB8J8.0CA-E3/52 has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated 100 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream ICs in the SMB8J8.0CA-E3/52 protection circuit.
Is SMB8J8.0CA-E3/52 suitable for automotive applications?
Yes, SMB8J8.0CA-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - all validated per automotive reliability standards. The "HE3" suffix variant (e.g., SMB8J8.0CAHE3) denotes the AEC-Q101 version, and SMB8J8.0CA-E3/52 is RoHS-compliant and compatible with automotive manufacturing processes.
How does SMB8J8.0CA-E3/52 differ from unidirectional SMBJ8.0A variants?
SMB8J8.0CA-E3/52 is bidirectional with symmetrical clamping for both polarities, while SMBJ8.0A is unidirectional and requires correct cathode orientation. SMB8J8.0CA-E3/52 has 800 W PPPM (10/1000 μs), whereas SMBJ8.0A offers 1000 W but only in one direction. The "C" in SMB8J8.0CA-E3/52 explicitly denotes bidirectional functionality, critical for AC-coupled or floating signal lines where polarity is undefined.
What is the thermal resistance of SMB8J8.0CA-E3/52, and how does it affect layout?
SMB8J8.0CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This means effective heat dissipation requires adherence to the recommended pad layout - undersized pads increase thermal impedance, risking junction overheating during repetitive surges. Layout must follow Vishay's DO-214AA mounting guidelines to maintain rated PPPM performance.
Does SMB8J8.0CA-E3/52 require polarity marking during PCB assembly?
No, SMB8J8.0CA-E3/52 does not require polarity marking because it is a bidirectional TVS diode with identical electrical behavior at both terminals. Unlike unidirectional variants (e.g., SMBJ8.0A), there is no cathode band or functional anode/cathode distinction - the device clamps symmetrically for positive and negative transients. This simplifies automated placement and eliminates orientation errors in high-volume manufacturing of SMB8J8.0CA-E3/52 assemblies.
SMB8J8.0CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 58.8A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J8.0CA-E3/52 FAQ
1.How can I place an order for SMB8J8.0CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J8.0CA-E3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB8J8.0CA-E3/52 reliable?
The price and inventory of SMB8J8.0CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J8.0CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J8.0CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J8.0CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J8.0CA-E3/52?
SMB8J8.0CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J8.0CA-E3/52 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB8J8.0CA-E3/52?
For technical support, including SMB8J8.0CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J8.0CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J8.0CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J8.0CA-E3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB8J8.0CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J8.0CA-E3/52?
All SMB8J8.0CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J8.0CA-E3/52, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB8J8.0CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J8.0CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J8.0CA-E3/52 Tags
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